The lead doctor for this study (Dr. Bruce Rubin), was quoted as saying: "Infants and young children have airways that are much narrower than those of adults, so any increase in mucus or inflammation can narrow them more severely." The end result of using something like Vicks Vapo Rub, is that the brain is tricked into thinking that the airway is clear by some of the ingredients sent up into the system. The doctors note that the menthol in the Vicks Vapo Rub is one of the key ingredients that does this, stating that "Vicks may make you feel better but it can't help you breathe better."
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